We look at the division of 63939105 by 412 
We want to figure out the number of times 63939105 can be divided by 412.

On to step 1:
6 divided by 412 is 0 with a remainder of 6.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 6 to get 6.
Take the next digit (3) from the dividend and append it to 6, then repeat: 63 / 412

Going ahead to step 2:
63 divided by 412 is 0 with a remainder of 63.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 63, we get 63.
Fetch the next digit (9) from the dividend, attach it to 63 and continue: 639 / 412

Going ahead to step 3:
If we divide 639 by 412, we get 1 and a remainder of 227.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
Subtracting 412 from 639 leaves us with 227.
Grab the next digit (3) from the dividend, add it to 227, then carry on: 2273 / 412

Going ahead to step 4:
If we divide 2273 by 412, we get 5 and a remainder of 213.
The number 5 becomes the next digit in our result. 
Result so far: 15.0
If we take 2060 away from 2273, we end up with 213.
Bring next digit (9) of the dividend behind the 213 and repeat the process: 2139 / 412

Going ahead to step 5:
The number 412 fits into 2139 5 times, leaving a remainder of 79.
The number 5 becomes the next digit in our result. 
Result so far: 155.0
If we subtract 2060 from 2139, we get 79.
Fetch the next digit (1) from the dividend, attach it to 79 and continue: 791 / 412

Advancing to step 6:
791 divided by 412 is 1 with a remainder of 379.
Write down 1 as next digit of the result. 
Result so far: 1551.0
If we subtract 412 from 791, we get 379.
Include the next digit (0) from the dividend after 379, then repeat: 3790 / 412

On to step 7:
3790 divided by 412 is 9 with a remainder of 82.
Record the quotient 9 as the next digit in the result. 
Result so far: 15519.0
Subtracting 3708 from 3790 leaves us with 82.
Bring next digit (5) of the dividend behind the 82 and repeat the process: 825 / 412

Going ahead to step 8:
412 goes into 825 2 times with a remainder of 1.
Write down 2 as next digit of the result. 
Result so far: 155192.0
Subtracting 824 from 825 leaves us with 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

On to step 9:
412 goes into 10 0 times with a remainder of 10.
The next digit of our result is 0. 
Result so far: 155192.0
If we take 0 away from 10, we end up with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Moving on to step 10:
412 can be fit into 100 0 times, resulting in a remainder of 100.
Write down 0 as next digit of the result. 
Result so far: 155192.0
If we take 0 away from 100, we end up with 100.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1000, and continue the process.

The final result is 155192.0 with a remainder of 0.1.